Wireless Communication Device

1. A wireless communication device configured to operate selectively in one of a plurality of states comprising a parent station state which functions as a parent station of a wireless network and a child station state which functions as a child station of the wireless network, the wireless communication device comprising: a processor; and a memory storing computer-readable instructions therein, the computer-readable instructions, when executed by the processor, causing the wireless communication device to perform: (A) executing a state determination process of determining that one of the wireless communication device and another device is to operate in the parent station state of a first wireless network and determining that the other of the wireless communication device and the other device is to operate in the child station state of a first wireless network, so as to establish a first type of connection with the other device such that the wireless communication device operates in a state determined in the state determination process, wherein in a case where the first type of connection with a first device is to be established, the first type of connection with the first device is established by using a first wireless channel; and (B) establishing a second type of connection with another device such that the wireless communication device and the other device belong to a second wireless network different from the first wireless network, wherein in a case where the second type of connection with a second device different from the first device is to be established, the second type of connection with the second device is established by using a second wireless channel; (C) judging in a specific situation whether a value of the first wireless channel and a value of the second wireless channel are identical or not, the specific situation being a situation in which one connection of the first type of connection with the first device and the second type of connection with the second device is to be established, while the other connection of the first type of connection with the first device and the second type of connection with the second device has been established; wherein the above (A) and the above (B) include: forming a multiple connection state in a first case where it is judged that the value of the first wireless channel and the value of the second wireless channel are identical, the multiple connection state being a state in which both the first type of connection with the first device and the second type of connection with the second device are established; and forming a single connection state in a second case where it is judged that the value of the first wireless channel and the value of the second wireless channel are not identical, the single connection state being a state in which one particular connection is established, the one particular connection being one connection of the first type of connection with the first device and the second type of connection with the second device.

2. The wireless communication device as in claim 1 , wherein the one particular connection is the second type of connection with the second device.

3. The wireless communication device as in claim 1 , wherein the specific situation is a situation in which the second type of connection with the second device is to be established while the first type of connection with the first device has been established, in the second case, the above (A) includes disconnecting the first type of connection with the first device which is currently established, and in the second case, the above (B) includes establishing the second type of connection with the second device which is the one particular connection.

4. The wireless communication device as in claim 1 , wherein the above (A) and the above (B) include disconnecting the other connection which is currently established in the second case, so as to form the single connection state by establishing the one connection which is the one particular connection.

5. The wireless communication device as in claim 1 , wherein in the second case, the above (A) and the above (B) include disconnecting the other connection which is currently established by changing a value of a wireless channel which is currently used in the other connection to a value of a wireless channel which is to be used in the one connection, so as to form the single connection state by establishing the one connection which is the one particular connection.

6. The wireless communication device as in claim 1 , wherein in the specific situation in which the second type of connection with the second device is to be established while the first type of connection with the first device has been established: in the second case, the above (A) includes disconnecting the first type of connection with the first device; and in the second case, the above (B) includes establishing the second type of connection with the second device, wherein in the specific situation in which the first type of connection with the first device is to be established while the second type of connection with the second device has been established: in the second case, the above (A) includes not establishing the first type of connection with the first device; and in the second case, the above (B) includes keeping the second type of connection with the second device.

7. The wireless communication device as in claim 1 , wherein the above (A) includes establishing the first type of connection with the first device in a situation in which the first type of connection with the first device is to be established while the second type of connection with the second device has not been established, and the above (B) includes establishing the second type of connection with the second device in a situation in which the second type of connection with the second device is to be established while the first type of connection with the first device has not been established.

8. The wireless communication device as in claim 1 , wherein the second device is an access point.

9. The wireless communication device as in claim 3 , wherein in a situation in which the first type of connection with the first device is to be established while the second type of connection with the second device has not been established, the above (A) includes executing the state determination process by comparing a first setting value that the wireless communication device is storing with a setting value that the first device is storing, in the second ease, the above (A) further includes to change the first setting value that the wireless communication device is storing to a second setting value which is easier to be determined than the first setting value that the wireless communication device is to operate in the parent station state in the state determination process, and in the second case and in a situation in which the first type of connection with another device is to be established after disconnecting the first type of connection with the first device, the above (A) includes executing the state determination process by comparing the second setting value that the wireless communication device is storing with a setting value that the other device is storing.

10. The wireless communication device as in claim 3 , wherein in the second case, the above (A) further includes setting a particular mode to keep the wireless communication device operating in the parent station state, and in the second case and in a situation in which the first type of connection with another device is to be established after disconnecting the first type of connection with the first device, the above (A) includes keeping the wireless communication device operating in the parent station state without executing the state determination process.

11. The wireless communication device as in claim 3 , wherein in the second case, the above (A) includes disconnecting the first type of connection with the first device by changing the value of the first wireless channel which is currently used in the first type of connection with the first device to the value of the second wireless channel.

12. The wireless communication device as in claim 11 , wherein the computer-readable instructions, when executed by the processor, cause the wireless communication device to further perform: (D) notifying the first device of the value of the second wireless channel in the second case.

13. The wireless communication device as in claim 11 , wherein in the second case and in a case where a current state of the wireless communication device is the parent station state, the above (A) includes disconnecting the first type of connection by changing the value of the first wireless channel which is currently used in the first type of connection with the first device to the value of the second wireless channel, and in the second case and in a case where the current state of the wireless communication device is the child station state, the above (A) includes disconnecting the first type of connection by changing a state of the wireless communication device from the child station state to a particular state different from the parent station state and the child station state.

14. The wireless communication device as in claim 8 , wherein the value of the second wireless channel is a value determined by the access point.

15. A non-transitory computer-readable storage medium storing computer-readable instructions for a wireless communication device configured to operate selectively in one of a plurality of states comprising a parent station state which functions as a parent station of a wireless network and a child station state which functions as a child station of the wireless network, the computer-readable instructions, when executed by a processor of the wireless communication device, cause the wireless communication device to perform: (A) executing a state determination process of determining that one of the wireless communication device and another device is to operate in the parent station state of a first wireless network and determining that the other of the wireless communication device and the other device is to operate in the child station state of a first wireless network, so as to establish a first type of connection with the other device such that the wireless communication device operates in a state determined in the state determination process, wherein in a case where the first type of connection with a first device is to be established, the first type of connection with the first device is established by using a first wireless channel; and (B) establishing a second type of connection with another device such that the wireless communication device and the other device belong to a second wireless network different from the first wireless network, wherein in a case where the second type of connection with a second device different from the first device is to be established, the second type of connection with the second device is established by using a second wireless channel; (C) judging in a specific situation whether a value of the first wireless channel and a value of the second wireless channel are identical or not, the specific situation being a situation in which one connection of the first type of connection with the first device and the second type of connection with the second device is to be established, while the other connection of the first type of connection with the first device and the second type of connection with the second device has been established; wherein the above (A) and the above (B) include: forming a multiple connection state in a first case where it is judged that the value of the first wireless channel and the value of the second wireless channel are identical, the multiple connection state being a state in which both the first type of connection with the first device and the second type of connection with the second device are established; and forming a single connection state in a second case where it is judged that the value of the first wireless channel and the value of the second wireless channel are not identical, the single connection state being a state in which one particular connection is established, the one particular connection being one connection of the first type of connection with the first device and the second type of connection with the second device.

16. A wireless communication device comprising: a processor; and a memory storing computer-readable instructions therein, the computer-readable instructions, when executed by the processor, causing the wireless communication device to perform: establishing, in a case where a first type of connection with a first device is to be established when a second type of connection with an access point different from the first device is not established, the first type of connection with the first device using a first wireless channel such that the wireless communication device and the first device belong to a first wireless network; establishing, in a case where the second type of connection with the access point is to be established when the first type of connection with the first device is not established, the second type of connection with the access point using a second wireless channel such that the wireless communication device and the access point belong to a second wireless network different from the first wireless network, a value of the second wireless channel being a value determined by the access point, in a case where a value of the first wireless channel and the value of the second wireless channel are not identical under a situation in which the second type of connection with the access point is to be established, when the first type of connection with the first device has been established, disconnecting the first type of connection with the first device which is currently established; and establishing the second type of connection with the access point.

17. The wireless communication device as in claim 16 , wherein the disconnecting of the first type of connection with the first device is performed by changing the value of the first wireless channel which is currently used in the first type of connection with the first device to the value of the second wireless channel.

18. The wireless communication device as in claim 16 , wherein the computer-readable instructions, when executed by the processor, causing the wireless communication device to further perform: keeping, in a case where the value of the first wireless channel and the value of the second wireless channel are not identical under a situation in which the first type of connection with the first device is to be established, when the second type of connection with the access point has been established, the second type of connection with the access point without establishing the first type of connection with the first device.

19. The wireless communication device as in claim 16 , the computer-readable instructions, when executed by the processor, causing the wireless communication device to further perform: in a case where the value of the first wireless channel and the value of the second wireless channel are identical under the situation in which the second type of connection with the access point is to be established, when the first type of connection with the first device has been established, keeping the first type of connection with the first device; and establishing the second type of connection with the access point.

20. The wireless communication device as in claim 16 , wherein the computer-readable instructions, when executed by the processor, cause the wireless communication device to further perform: judging, in the situation in which the second type of connection with the access point is to be established, when the first type of connection with the first device has been established, whether the value of the first wireless channel and the value of the second wireless channel are identical or not, wherein in the case where it is judged that the value of the first wireless channel and the value of the second wireless channel are not identical, the disconnecting of the first type of connection with the first device is performed; and the establishing of the second type of connection with the access point is performed.

21. The wireless communication device as in claim 16 , configured to operate selectively in one of a plurality of states comprising a parent station state which functions as a parent station of a wireless network, wherein the first type of connection with the first device is established such that the wireless communication device operates in the parent station state, the value of the first wireless channel being a value determined by the wireless communication device operating in the parent station state.